Electrical condenser



` Nov. 6, 1928.

1,690,674 P. E. GILLING ELECTRICAL CONDENSER Filed Feb. 19, 1925 /Nl/E/VTUH PRESTO/v E. GALL/NG TTOR/VEV f vide a Patented Novf 6, 1928.

UNITED STATES A PRESTON E. GILLING, OF EAST ORANGE,

DENSEB COMPANY, OF

NEW JEEsEY, AssrGNon TofnAmo con- GAMDEN, NEW JERSEY.

ELECTRICAL ooNDENsER.

Application ld February r This invention relates t0 an electrical condenser in which a stack of alternate layers of mica and metal foil are built up and held between aI pair of binding or bolster plates through the medium of clamping members which engage, not only the binding members, but the ends of the metal foil which have alternate layers brought out at the opposite ends of the condenser stack.

The condenser stack per se, may be constructed in any suitable manner such as that described in V an Deventer Patent 1,181,623 issued May 2, 1916, or in the application of Harry A. Hatch, Serial No. 417,347 filed October 16, 1920, now Patent 1,574,424, issued Feb. 23, 1926.

The condenser herein -disclosed is particularly adapted for use in connection with radio circuits and apparatus, although it is to be understood that it is not limited exclusively to this kind of use.

In the Van Deventer patent, and Hatch application above referred to, certain types of clamping terminalsA are shown and described. The clamping terminal herein disclosed differs in a number of important Ways from the terminals of said patent and application referred to, or other prior art.

One of the objects being to provide a terminal which not only acts to hold the condenser stack together and act as a terminal, but to Aprovide means by which wires or conductors may be quicklyattached or detached from the terminal.

A further object of my invention is to rouick detachable terminal in w ich a plurality of wires may be quicklyattached or detached therefrom, said wires being in the same straight line on an angle toeach other.

A further object is to provide a terminal in which the conductors may be slidably attached to the condenser so that the condenser as a whole, may be shifted on the conductor for the purpose of balancing the radio set when the condensers are used therein.

A still further objectof my invention is to provide a new 'and novel means of securing the terminal to the binding or bolster plates so that the terminals cannot be accidentally pulled off.

These and other objects will be apparent to one skilled in this art, after a studv of the specification taken in connection with the annexed drawing wherein radio'practise.

19, 1925. Serial No. 10,214.

Figure 1 is a plan view of the condenser Showing a plurality of conductors connected thereto. i

4Figure 2 is a side view of Figure 1.

Figure?) is an end view of Fig. 1.

Figure 4 is a plan view of the condenser terminal before the central portion'thereof is formed or rolled hack to complete a part of the conductor clamping means.

Figure 5 is a bottom viewof the condenser '/showing means for holding the clamping terminal to the binding or bolster plate.

Figure 6 is a part section on an enlarged scale on the lines 6--6 of Fig. 1, without the connecting Wire or bus-bar as is referred to in Figure 7 is a part lsectional view on an enlarged scale on the lines 7 -7 of Fig. 1 without the connecting wire.

Referring now to the details wherein like numbers refer to corresponding parts in the various views, 1 illustrates the top binding or bolster plate'which may be of any suitable thickness, to provide sufficient stiffness to insure that the stack is properly held in position by the terminal clamps 2 and 3 which are preferably made of good stiiil metal, so that when they are brought into the position over the stack shown in Fig. 1, and clamped in position they will retain this position thereby insuring that the condenser will maintain its rated capacity. Theterminal, 4as indicated in Figure 3, is bent over the stack on both sides and the space between the terminals may be of any desired dimensions to produce the necessary results. The central portion 4 (see Fig. '4) of the terminal is formed or rolled back on itself thereby forming a throat 5. Theportion 4 has a hole 6 through which the end of the wire or conductor may pass. Preferably formed integral with the terminal is a bridge 7 jconstructed by reason of slits 8 and 9 through the middle of the terminal. The bridge is then formedv at its center into what 100 may be termed an eyelet 10 adapted to receive the wire or conductor. The periphery of the eyelet 10` is preferably somewhat out of alignment with the hole 6 (see Fig. 7) so l that as the wire is inserted through the eye- 106 let 10. the end will engage the throat 5 and be bent slightly downward or guided bythe throat into` the opening 6: thus', it will be seien that the wire is gripped between the eye-v let l() and throat 5y to give a good, but sliding 110 contact to the conductor at the said oonnec` `tion. The terminal clamps Q and 3 each have at their edges, portions 11 and 12 formed into eyelets 13 and let which are in substantial alignment with the larger eyelet formed by the portion L1, when it is rolled into position shown in Fig- 1. rl`his construction enables a conductor to pass longitudinally through what is in eliect, three eyelets, giving a gripping action on the conductor and it will be seen that when the condenser is mounted on a pair of wires or bus-bars in a. radio set, the whole condenser may be slid long on the conductors for the purpose of tuning the various pieces of apparatus. From what has been said, it will also be clearly understood that after the condenser has been positioned in a longitudinal direction, a crossconductor may be readily passed through the eyelet 10 and the end of the throat 5, where it is gripped sufficiently even though the horizontal conductors may be in position.

In the Hatch application referred to, certain portions of the clamps 2 and 3 are indicated as being bent downward into holes or depressions in the binding or bolster plates, such means are indicated at 15. These lips may or may not be used.

As a further means for holding the terminals in position, I may form indentations 16 in the bridge 7 which indcntations may enter holes or depressions 17 in the binding plate. As a still further means for securing the terminals to the binding or bolster plates, I may press a portion 18 of the binding or bolster plate downward so as to engage notches 19 in the terminals 2 and 3 (see Figs. 5 and 7) so that when these terminals are forced into position, the portion 18 will drop into the notches 19, as is clearly shown in Fig. 7. This figure also indicates how the alternate layers of metal foil may be brought out at the end and over the top of the binding or bolster plates to be engaged by the clamping terminalsQ and 3.

It Will be clear that the details for carrying my invention into practise may be varied and I therefore do not wish to be unduly limited in the interpretation of the appended claims.

Having thus described my invention what I claim is:

l. For a condenser of the class described, a metallic member acting as a clamping means for the condenser stack and having means for slidably receiving a pluralit \v of conductors, in the same straight line or at an angle as desired.

2. For a condenser kof the class described, a metallic member acting as a clamping terminal means for the condenser stack and having a portion formed back on itself forming a wire clamp with an opening therein, said member also having a bridge melnber formed with an eyelet somewhat out of alignment with said opening whereby a conductor is gripped on being inserted through the eyelet and opening in the clamp.

3. For a condenser of the class described, a metallic member acting as a clamping terminal means for the condenser stack, and having a portion formed back on itself forming a wi re clamp with a throat portion leading to an opening at the rear of the throat, said member having an integral bridge formed with an eyelet in front of the throat whereby a conductor inserted through the'ejvelet is guided by the threat through said opening.

't. For a condenser of the class described, a metallic member acting as a clamping terminal meansI for the condenser stack, said member having; a central portion formed back on itself forming a receptacle for clamping a wire, a pair of eyelets at its edges substantially in alignment with said wire receptacle and a bridge formed with an eyelet for cooperating with a part of the receptacle for clamping a wire..

.3. For a condenser of the class described having a pair of binding plates, having depressions therein, a metallic member acting as a clamp and terminal engaging a part of the elements of the stack, means for preventing said metallic member from being pulled oitl the stack comprising; a bridge member having parts formed downward into said depressions in the binding)I plate.

G. For a condenser of the class described having a pair of binding plates, having depre'.. ions therein, a metallic member acting as a clamp and terminal engaging a part of the elements of the stack, and also having means for slidably attaching a conductor thereto, said means including a bridge having an eyelet therein to receive the conductor, said bridge also having parts formed to enter said depressions thereby preventing said clamps from being accidentally pulled off the stack.

7. For avcondenser of the class described having a pair of binding plates, having depressions therein. a metallic member acting as a clamp and terminal engaging a part of the elements of the stack, dual means preventing said terminal from being pulled oft1 the stack comprising; a. portion of said binding member punched outwardly so as to drop into said depression when the clamp is forced all the way onto the stacl; and a bridge member integral withtlie clamp having parts formed to engage the binding members.

In testimony whereof, I atiix my signature PRESTON E. GILLIG 

